RHEL 7.3修改网卡命名规则为ethX

RHEL 7网卡默认命名规则：以太网卡(Ethernet)为enX，无线网卡(WLAN)为wlX，修改网卡命名规则为ethX如下：

1、修改/etc/sysconfig/grub文件，添加net.ifnames=0 biosdevname=0

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1. [root@rhel73-std ~]# cat /etc/sysconfig/grub
2. GRUB_TIMEOUT=5
3. GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
4. GRUB_DEFAULT=saved
5. GRUB_DISABLE_SUBMENU=true
6. GRUB_TERMINAL_OUTPUT="console"
7. GRUB_CMDLINE_LINUX="crashkernel=auto net.ifnames=0 biosdevname=0 rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet"
8. GRUB_DISABLE_RECOVERY="true"
9. [root@rhel73-std ~]#

2、备份/boot/grub2/grub.cfg后，重新生层grub.cfg配置文件，使用命令：grub2-mkconfig -o /boot/grub2/grub.cfg

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1. [root@rhel73-std ~]# cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.old 
2. [root@rhel73-std ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
3. Generating grub configuration file ...
4. Found linux image: /boot/vmlinuz-3.10.0-514.el7.x86_64
5. Found initrd image: /boot/initramfs-3.10.0-514.el7.x86_64.img
6. Found linux image: /boot/vmlinuz-0-rescue-59ad3ea4c90948209723894c6c92587b
7. Found initrd image: /boot/initramfs-0-rescue-59ad3ea4c90948209723894c6c92587b.img
8. done
9. [root@rhel73-std ~]#

3、重命名网卡配置文件为ifcfg-ethX，修改配置文件中的name和device值，并删除配置文件中UUID行（重启后ethX的UUID数值不一致），然后重启服务器

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1. [root@rhel73-std ~]# mv /etc/sysconfig/network-scripts/ifcfg-en33 /etc/sysconfig/network-scripts/ifcfg-eth0
2. [root@rhel73-std ~]# mv /etc/sysconfig/network-scripts/ifcfg-en34 /etc/sysconfig/network-scripts/ifcfg-eth1
3. [root@rhel73-std ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
4. TYPE=Ethernet
5. BOOTPROTO=none
6. DEFROUTE=yes
7. IPV4_FAILURE_FATAL=no
8. IPV6INIT=yes
9. IPV6_AUTOCONF=yes
10. IPV6_DEFROUTE=yes
11. IPV6_FAILURE_FATAL=no
12. IPV6_ADDR_GEN_MODE=stable-privacy
13. NAME=eth0
14. DEVICE=eth0
15. ONBOOT=yes
16. IPADDR=192.168.254.120
17. PREFIX=24
18. IPV6_PEERDNS=yes
19. IPV6_PEERROUTES=yes
20. IPV6_PRIVACY=no
21. [root@rhel73-std ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
22. TYPE=Ethernet
23. BOOTPROTO=dhcp
24. DEFROUTE=yes
25. PEERDNS=yes
26. PEERROUTES=yes
27. IPV4_FAILURE_FATAL=no
28. IPV6INIT=yes
29. IPV6_AUTOCONF=yes
30. IPV6_DEFROUTE=yes
31. IPV6_PEERDNS=yes
32. IPV6_PEERROUTES=yes
33. IPV6_FAILURE_FATAL=no
34. IPV6_ADDR_GEN_MODE=stable-privacy
35. NAME=eth1
36. DEVICE=eth1
37. ONBOOT=no
38. [root@rhel73-std ~]# reboot

4、对比修改前和修改后

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1. [root@rhel73-std ~]# ip addr
2. 1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
3. link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
4. inet 127.0.0.1/8 scope host lo
5. valid_lft forever preferred_lft forever
6. inet6 ::1/128 scope host
7. valid_lft forever preferred_lft forever
8. 2: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
9. link/ether 00:0c:29:43:bd:56 brd ff:ff:ff:ff:ff:ff
10. inet 192.168.254.120/24 brd 192.168.254.255 scope global ens33
11. valid_lft forever preferred_lft forever
12. inet6 fe80::4dda:101e:ccdd:882a/64 scope link
13. valid_lft forever preferred_lft forever
14. 3: ens34: mtu 1500 qdisc pfifo_fast state UP qlen 1000
15. link/ether 00:0c:29:43:bd:60 brd ff:ff:ff:ff:ff:ff
16. [root@rhel73-std ~]# ip a
17. 1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
18. link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
19. inet 127.0.0.1/8 scope host lo
20. valid_lft forever preferred_lft forever
21. inet6 ::1/128 scope host
22. valid_lft forever preferred_lft forever
23. 2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000
24. link/ether 00:0c:29:43:bd:56 brd ff:ff:ff:ff:ff:ff
25. inet 192.168.254.120/24 brd 192.168.254.255 scope global eth0
26. valid_lft forever preferred_lft forever
27. inet6 fe80::6d3b:9b3c:81db:9d30/64 scope link
28. valid_lft forever preferred_lft forever
29. 3: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000
30. link/ether 00:0c:29:43:bd:60 brd ff:ff:ff:ff:ff:ff
31. [root@rhel73-std ~]#